Will the state of charge displayed reduce from 100% as the capacity reduces due to aging?

On a full charge, any battery will always show 100% SoC regardless of the capacity remaining, as that measurement is based on the voltage of the battery pack. Assuming the battery degrades to 80% in 5 years, it won’t stop at an 80% charge when charging.

However, the estimated range for a fully charged battery with 100% capacity vs 80% capacity should be reflected based on SoH (State of health).

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